2122120121 has 4 divisors (see below), whose sum is σ = 2315040144. Its totient is φ = 1929200100.

The previous prime is 2122120111. The next prime is 2122120129. The reversal of 2122120121 is 1210212212.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2122120121 - 2³⁰ = 1048378297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 2122120096 and 2122120105.

It is not an unprimeable number, because it can be changed into a prime (2122120129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96459995 + ... + 96460016.

It is an arithmetic number, because the mean of its divisors is an integer number (578760036).

Almost surely, 2^2122120121 is an apocalyptic number.

It is an amenable number.

2122120121 is a deficient number, since it is larger than the sum of its proper divisors (192920023).

2122120121 is a wasteful number, since it uses less digits than its factorization.

2122120121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192920022.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 2122120121 is about 46066.4750225150. The cubic root of 2122120121 is about 1285.0597500315.

Adding to 2122120121 its reverse (1210212212), we get a palindrome (3332332333).

The spelling of 2122120121 in words is "two billion, one hundred twenty-two million, one hundred twenty thousand, one hundred twenty-one".